Floor-cleaning machine comprising a fan device

Abstract

The invention relates to a floor-cleaning machine comprising: a floor head (12) which is associated with a placement plane (28) for a floor (18) to be cleaned; at least one cleaning tool (56; 58) which is rotatably mounted on the floor head (12); a holding rod device (14) which is movably articulated on the floor head (12) via an articulation device (16); a fan device (100) which, during operation of the floor-cleaning machine, generates a suction flow; and a dirty-fluid tank device (104) for receiving dirty fluid, characterised in that: the fan device (100) is arranged on the floor head (12); the dirty-fluid tank device (104) is removably seated on the floor head (12); and an axis (278) of the fan device is oriented at an acute angle (286) to the placement plane (28).

Description

[0001] Floor cleaning machine with blower device

[0002] The invention relates to a floor cleaning machine, comprising a floor head, to which a mounting plane for a floor to be cleaned is assigned, at least one cleaning tool which is rotatably arranged on the floor head, a holding rod device which is movably connected to the floor head via a joint device, a blower device which generates a suction flow during operation of the floor cleaning machine, and a dirty fluid tank device for receiving dirty fluid.

[0003] US 2014 / 0115819 A1 discloses a floor cleaning device with a cleaning unit.

[0004] CN 114795012 A also discloses a floor cleaning device.

[0005] CN 215128118 U discloses a floor cleaning device with a dirty water tank.

[0006] DE 10 2016 208 895 A1 discloses a soil tillage module for a soil tillage machine with at least two rotatable soil tillage tools, which, in an operating position of the soil tillage module, are each rotatably mounted relative to a support structure about a rotational axis oriented at least substantially perpendicular to a subsoil to be tilled. The drive system for driving the soil tillage tools comprises at least one electric motor and at least one belt drive coupled to a drive shaft of the at least one electric motor. The at least one electric motor is mounted in a horizontal orientation on the support structure such that the drive shaft is oriented at least substantially orthogonal to the rotational axes of the tillage tools.Further cleaning machines are known from CN 211749345 U, CN 204445698 U, US 8,161,595 Bl, DE 197 29 199 Al, KR 960004005 U, US 3,024,848 A, DE 1 239 448 B, GB 823 576 A and US 1,938,300 A.

[0007] The invention is based on the object of providing a floor cleaning machine of the type mentioned above, which has long operating times while being easy to operate and providing optimised cleaning results.

[0008] This object is achieved according to the invention in the floor cleaning machine mentioned at the outset in that the blower device is arranged on the floor head, that the dirty fluid tank device is removably mounted on the floor head, and that an axis of the blower device is oriented at an acute angle to the installation plane.

[0009] The blower unit generates a suction flow, which pumps the dirty fluid into the dirty fluid tank unit. Both the dirty fluid tank unit and the blower unit are located at the bottom head. This results in short flow paths. By arranging the dirty fluid tank unit at the bottom head, the dirty fluid tank unit can be designed with a high storage capacity. This, in turn, results in long operating times and sustainable operation.

[0010] The arrangement of both the blower unit and the dirt fluid tank unit on the floor head provides the operator with an optimized center of gravity for the floor cleaning machine. This, in turn, results in easy handling and good maneuverability. The blower unit is positioned at an angle to the installation plane on the floor head. This prevents water from accumulating on the blower unit and remaining there for extended periods, even when the floor cleaning machine is being stored, for example. The inclined position of the blower unit with the corresponding axis ensures that fluid drains from the top of the blower unit. The deposition of dirt particles is reduced.This largely prevents, or at least reduces, damage to the blower unit and bearings (especially of a blower motor) caused by fluid penetration and deposited dirt particles, thereby increasing operating time. This ensures sustainable operation.

[0011] It can be provided that a floor cleaning machine according to the invention has a transport option in the form of a sack barrow, in which the floor cleaning machine is tilted as a whole and moved across a floor. To ensure that such a transport is possible even when the dirty fluid tank device is full, a suction connection for coupling a suction flow into the receiving space of the dirty fluid tank device is advantageously arranged at the top and front of the dirty fluid tank device. By inclining the blower device with its axis at an acute angle to the installation device, the distance between a suction connection of the blower device and a corresponding suction connection on the dirty fluid tank device can be kept relatively short in such an arrangement. This makes it possible to provide a relatively short, streamlined suction path to the blower device.This results in effective use of the suction power of the blower device.

[0012] It is advantageous if at least one of the following is provided: the axis of the blower device is a rotational axis of at least one impeller of the blower device; the axis of the blower device is a motor axis of a motor of the blower device; the blower device has its greatest longitudinal extent parallel to the axis; the axis of the blower device is a normal for an upper side of the blower device, wherein a suction connection is arranged on the upper side.

[0013] The axis of the blower device can also be an axis of symmetry of the blower device.

[0014] This results in a space-saving arrangement of the blower device on the floor head with effective use of the suction power of the blower device.

[0015] It has proven advantageous if at least one of the following is provided: the acute angle is greater than or equal to 45° and is in particular greater than or equal to 50° and is in particular greater than or equal to 55°; the acute angle is less than or equal to 75° and is in particular less than or equal to 70° and is in particular less than or equal to 65°.

[0016] This results in a space-saving, compact design. A relatively short effective flow path for the intake can be achieved. This results in effective "drip-off" of liquid from the top of the blower device, preventing liquid from stagnating. Furthermore, it is advantageous if a rotational axis of the at least one cleaning tool is oriented at an acute angle of greater than 10°, and in particular greater than 40°, to the axis of the blower device.

[0017] If this rotation axis is inclined at a (small) acute angle, which is in particular less than 10°, to the installation plane, then propulsion can be achieved, especially with two cleaning tools. In this case, for the reasons stated above, it is advantageous if the rotation axes are at an acute angle to the axis of the blower device, whereby the angle then differs from the acute angle of the axis of the blower device to the installation plane or from the supplementary angle of 90° to this acute angle.

[0018] It is particularly advantageous if the blower device is arranged on a floor head body of the floor head at an angle relative to its axis such that an underside of the blower device, which faces the installation plane, has a smaller distance to a rear end of the floor head body at a center on the axis than an upper side of the blower device facing away from the underside, wherein the rear end is relative to a forward direction of travel of the floor head. This effectively prevents liquid from stagnating and dirt particles from accumulating on the upper side of the blower device. This results in a relatively short suction path and thus effective use of the suction power of the blower device.

[0019] It is also advantageous if a suction connection of the blower device is arranged on an upper side of the blower device, which faces away from a lower side of the blower device, wherein the lower side faces the installation plane, and wherein, in particular, at least with respect to an envelope plane, the upper side of the blower device is oriented at an acute angle to the installation plane. This effectively prevents water from accumulating on the blower device. This results in a relatively short suction path for coupling the suction flow into the dirty fluid tank device, thus enabling effective use of the suction power of the blower device.

[0020] Furthermore, it is advantageous if at least one of the following is present: the suction port of the blower device lies on the axis of the blower device; a center of the suction port of the blower device, which lies on the axis, has a greater distance from a rear end of a floor head body of the floor head than a center of the underside, which lies on the axis.

[0021] This results in a compact design with a relatively short intake path.

[0022] In one embodiment, the dirty fluid tank device has a receiving chamber with a receiving space for dirty fluid, and at least one suction port is arranged on the receiving chamber. The suction port on the receiving chamber is the port through which a suction flow is coupled into the receiving space. This design results in a space-saving structure with a large receiving volume. For example, a dirty fluid tank device can then be implemented that allows for a transport journey even when the dirty fluid tank device is filled.

[0023] It is particularly advantageous if the dirty fluid tank device has at least one channel which leads from the at least one suction connection on the receiving chamber to a connecting connection of the dirty fluid tank device for connection to the blower device. This makes it possible to achieve a spatial separation (spatial spacing) between the at least one suction connection on the receiving chamber and the connecting connection. The at least one suction connection on the receiving chamber is the connection at which the suction flow is coupled into the receiving space. The connecting connection is the connection at which the dirty fluid tank device is coupled to the blower device. The connecting connection serves to couple the suction flow from the blower device into the dirty fluid tank device. The channel bridges the distance between the suction connection on the receiving chamber and the connecting connection.This allows for effective use of the suction power. In particular, at least one suction connection can be positioned at the top and front of the receiving chamber. This allows a transport run to be carried out even when the dirt fluid tank is full.

[0024] Furthermore, the at least one channel can still absorb liquid, for example, if dirty fluid spills over from the receiving chamber. This at least makes it difficult for liquid to directly spill into the blower device.

[0025] In particular, the at least one suction port on the receiving chamber is a first suction port of the dirty fluid tank device, which opens into the receiving space, and the connecting port is a second suction port of the dirty fluid tank device, which is designed for fluid-effective coupling to a suction port of the blower device. The first suction port ensures that the receiving space is subjected to the suction flow, and the second suction port ensures that the suction flow generated by the blower device is coupled into the dirty fluid tank device. With respect to the suction flow, the second suction port is connected upstream of the first suction port. By providing a spaced-apart first suction port and second suction port, optimization with respect to different conditions can be achieved. A high receiving volume for the receiving space can be achieved.The direct sloshing of contaminated fluid from the receiving chamber to the blower unit can be at least significantly suppressed. A transport run can be carried out with the contaminated fluid tank unit filled.

[0026] It is advantageous if the connecting connection has an outlet surface with at least one of the following: when the dirty fluid tank device is located on the base head, the outlet surface is oriented at an acute angle to the installation plane; when the dirty fluid tank device is located on the base head, a normal of the outlet surface is at least approximately parallel to the axis of the blower device; when the dirty fluid tank device is located on the base head, the connecting connection is located above the suction connection of the blower device with respect to the axis of the blower device; the dirty fluid tank device has a free space for the blower device at the connecting connection.

[0027] This allows the suction power of the blower unit to be used effectively. The accumulation of liquid on the blower unit can be largely prevented.

[0028] By providing the free space for the blower device, the dirty fluid tank device can be positioned on the floor head in a space-saving manner.

[0029] In one embodiment, the at least one channel on the

[0030] A connecting connection comprises a basin for holding liquid, having a basin bottom, wherein in particular the connecting connection is located on the basin bottom, and wherein in particular the basin bottom has a normal parallel to the axis of the blower device when the dirty fluid tank device is seated on the base head body. The inclined basin bottom makes it easy to achieve a fluid-tight connection between the connecting connection of the dirty fluid tank device and a corresponding mating connection (suction connection) of the blower device when the dirty fluid tank device is inserted. The basin can hold at least a certain amount of liquid that spills out of the receiving space and thus, to a certain extent, keep liquid away from the blower device. Furthermore, the basin can hold a certain amount of liquid that would otherwise be held by the top of the blower device (and then flow away from there).

[0031] Furthermore, it is advantageous if at least one of the following is provided: the at least one channel is arranged or formed in an upper region of the dirty fluid tank device, which, when the dirty fluid tank device is located on the base head, faces away from the installation plane; the at least one channel is arranged or formed at least partially on a cover of the dirty fluid tank device; with respect to a height axis of the base head perpendicular to the installation plane, the at least one channel is arranged above the receiving space when the dirty fluid tank device is located on the base head;the at least one channel extends from an area at or adjacent to a front side of the dirty fluid tank device to a rear side of the dirty fluid tank device, wherein the front side of the dirty fluid tank device faces a front end of a base head body of the base head and the rear side of the dirty fluid tank device faces a rear end of the base head body when the dirty fluid tank device is seated on the base head, and wherein the front end and the rear end of the base head body are related to a forward direction of travel of the base head; the at least one channel is arranged and designed such that a main flow direction in the at least one channel is at least approximately parallel to the installation plane when the dirty fluid tank device is seated on the base head;the at least one channel extends at least approximately parallel to a longitudinal axis of the dirty fluid tank device between a front side and a rear side of the dirty fluid tank device;

[0032] By arranging the channel at the top of the dirty fluid tank unit, for example, on a lid of the dirty fluid tank unit, effective use of space is achieved. This results in a short intake path and thus effective use of the suction power of the blower unit. Furthermore, an optimized suction result is achieved, as, for example, the greatest possible distance is possible between an intake opening on the dirty fluid tank unit and at least one suction connection. Furthermore, this allows for the simple arrangement of at least one suction connection on the receiving chamber "above" and "at the front." This, in turn, makes it easy to carry out a transport journey even with a full dirty fluid tank unit.

[0033] By arranging the duct in a direction from the front to the rear (although the duct does not necessarily have to extend all the way to the front), a relatively short intake path is created for effective use of the suction power of the blower unit. This results in a space-saving design. For example, this allows the duct to be effectively integrated into an openable lid of the dirty fluid tank unit.

[0034] The arrangement and design of the channel in such a way that a main flow direction is at least approximately parallel to the installation plane results in a relatively short, streamlined intake path with effective use of the suction power.

[0035] For the same reason, it is advantageous if the at least one channel extends at least approximately parallel to a longitudinal axis of the dirty fluid tank device and in particular also extends parallel to a longitudinal axis of the bottom head when the dirty fluid tank device is located on the bottom head.

[0036] It is particularly advantageous if the at least one suction connection on the receiving chamber is arranged on an upper side of the receiving chamber, which, when the dirt fluid tank device is located on the floor head, faces away from the installation level. This makes it possible, for example, to achieve transportability of the floor cleaning machine as a whole.

[0037] For example, it can be tilted for such a transport trip. This minimizes the risk of liquid spilling out of the dirty fluid tank's holding chamber. This, in turn, makes it possible to carry out a transport trip even with the dirty fluid tank filled.

[0038] For the same reason, it is advantageous if the at least one suction connection on the receiving chamber is arranged such that it is located at least approximately at a highest point of the receiving space relative to a height direction perpendicular to the installation plane when the dirty fluid tank device is located at the floor head. Furthermore, it is also advantageous if the at least one suction connection on the receiving chamber is arranged closer to a front side of the dirty fluid tank device than to a rear side of the dirty fluid tank device. This allows for effective transport with the floor cleaning machine tilted, even when the dirty fluid tank device is filled.

[0039] In one embodiment, a cage is arranged on the receiving chamber, to which the at least one suction port is assigned. The cage is positioned in particular in the receiving space. It serves to calm the flow and at least reduce sloshing of liquid out of the receiving space. Furthermore, the cage can serve to accommodate a float, which in turn enables level monitoring.

[0040] It is advantageous if the cage is equipped with a float which can be used to close at least one suction connection when a certain fill level is reached. The fill level can be determined at least indirectly via the float. When, for example, a certain fill level is reached, the float is pressed against at least one suction connection and this is closed. This creates an (increased) negative pressure on one suction side of the blower device. This can in turn be determined, in particular via a negative pressure sensor, and the blower device can be switched off. The float enables a structurally simple fill level monitoring system to be achieved, whereby, for example, no electronic connection between the dirty fluid tank device and the floor head is necessary.

[0041] In a structurally advantageous embodiment, a vacuum sensor is provided by which a negative pressure can be detected upstream of a suction side of the blower device, wherein signals from the vacuum sensor are used to switch off the blower device. The vacuum sensor is used in particular in conjunction with a float on the receiving chamber. If, upon reaching a certain fill level in the receiving chamber, the float is pressed against the at least one suction connection, then an increased negative pressure is present on a suction side of the blower device. This negative pressure indicates that a certain upper fill level has been reached. By detecting the negative pressure via the vacuum sensor, filling of the dirty fluid tank device can be indirectly detected. The signal from the vacuum sensor, in turn, can be used to switch off the blower device.The vacuum sensor can be positioned outside the dirty fluid tank unit, particularly near the blower unit. This allows the dirty fluid tank unit to be designed electronically free, eliminating the need for an electrical connection between the dirty fluid tank unit and the floor head. This results in a structurally simple design. Electrical contacts between the dirty fluid tank unit and the floor head body, which can potentially become contaminated, can be avoided.

[0042] It is advantageous if the vacuum sensor is located on a base head body of the base head, particularly on the blower unit. This allows for easy, indirect detection of the upper fill level in the dirty fluid tank unit, without requiring the installation of any sensors or probes on the dirty fluid tank unit.

[0043] It is particularly advantageous if the dirty fluid tank device has at least one inlet connection for coupling dirty fluid into a receiving space, which is in particular connected to a suction bar when the dirty fluid tank device is located on the base head, and has at least one suction connection on a receiving chamber for fluidly connecting to the blower device, wherein the at least one inlet connection and the at least one suction connection are spaced apart along a vertical axis perpendicular to the installation plane and along a longitudinal axis between a front and a rear of the dirty fluid tank device, wherein the longitudinal axis is perpendicular to the vertical axis. This results in a large distance between the at least one suction connection, via which a suction flow is coupled into the receiving space, and the inlet connection, via which dirty fluid flows into the receiving space.This prevents suction from being drawn directly from the inlet connection via at least one suction connection.

[0044] For the same reason, it is advantageous if the at least one inlet connection and the at least one suction connection are also spaced apart along a transverse axis perpendicular to the longitudinal axis and perpendicular to the vertical axis. This results in a maximum distance.

[0045] In one embodiment, the dirty fluid tank device has a bottom, a top, a front, a back, a first lateral side, and a second lateral side opposite the first lateral side. The dirty fluid tank device has a cutout that is continuous and open between the bottom and the top, and that is open toward the back. This allows the dirty fluid tank device to be positioned on the floor head by means of the cutout via the joint device. This results in easy insertion and removal. A free space is provided for the mobility of the holding rod device.

[0046] For the same reason, it is advantageous if the dirty fluid tank device has a first web region, on which the first lateral side lies, a second web region, on which the second lateral side lies and which is spaced from the first web region, and a third web region, which is connected to the first web region and the second web region, wherein the cutout is formed between the first web region, the second web region, and the third web region. The dirty fluid tank device then forms a type of bracket, which can be pushed over the joint device.

[0047] It is particularly advantageous if at least one inlet connection of the dirty fluid tank device is arranged on the first web region, and at least one suction connection of the dirty fluid tank device is arranged on the second web region. This prevents direct suction through the at least one inlet connection.

[0048] Furthermore, it is advantageous if a connecting port of the dirty fluid tank unit is arranged for direct connection to the blower unit and a second web area. This allows, for example, a relatively short and particularly streamlined intake path to be realized at the dirty fluid tank unit. A high intake volume can be provided. An arrangement can be achieved in which tilted transport is possible even when the dirty fluid tank unit is full.

[0049] For the same reason, it is advantageous if at least one channel, connecting the at least one suction port and the connecting port, is arranged in the second web area. This results in a short, streamlined intake path at the dirty fluid tank device, thus enabling effective and sustainable use of the suction power of the blower device.

[0050] It is advantageous if the base head has a base head body on which the joint device is located, with the base head body in particular having a plate-shaped area. This results in a space-saving design. The plate-shaped area allows the dirty fluid tank device to be positioned on the base head in an optimized way for space utilization.It is advantageous if at least one of the following is provided: the joint device comprises a first joint with a first pivot axis and a second joint with a second pivot axis, wherein the first pivot axis and the second pivot axis are oriented transversely and in particular perpendicular to one another and the first pivot axis is oriented parallel to the installation plane; a first pivot axis of the joint device is oriented transversely and in particular perpendicular to a forward direction of travel of the ground head; by means of the joint device, the holding rod device is gimballed to the ground head and in particular has intersecting joint axes.

[0051] The articulation system with the first and second joints provides good maneuverability for the operator. This makes the machine easy to operate.

[0052] In particular, height adjustment can also be achieved via the first pivot axis of the joint device. In principle, the first pivot axis and the second pivot axis can be spaced apart from each other in a vertical direction. The joint device is then, in particular, a series connection of the first joint and the second joint. It is also possible for the joint device to be designed as a true cardanic joint (universal joint), in which the first joint axis and the second joint axis intersect. This results in good maneuverability.

[0053] It is particularly advantageous if the dirty fluid tank device has a cutout, wherein, when the dirty fluid tank device is positioned on the floor head, the joint device lies at least partially in the cutout. This makes it possible, in particular, to provide a single dirty fluid tank device as a unit, which can be fixed to the floor head in an optimized manner. The dirty fluid tank device can be realized with a large storage volume. This results in an optimized arrangement of the joint device, in particular for maneuverability of the floor cleaning machine and for adjustability of an angle of the holding rod device to a floor to be cleaned. The cutout provides a space which enables the dirty fluid tank device to be designed as a unit and an optimized arrangement on the floor head without hindering the mobility of the holding rod device relative to the floor head.

[0054] It is particularly advantageous if, with the dirty fluid tank device attached to the base head, a first joint of the joint device is positioned within the cutout such that a first pivot axis lies within the cutout. This results in optimized maneuverability while maintaining a simple design of the joint device.

[0055] It is particularly advantageous if a free space is arranged or formed on the floor head as a movement space for pivoting the holding rod device relative to the floor head about a first pivot axis, wherein the first pivot axis is perpendicular to a forward direction of travel of the floor head. This results in high maneuverability. An operator can easily adjust the angle of inclination of the holding rod device relative to the floor to be cleaned, resulting in a wide pivot range for the holding rod device and, in particular, the holding rod device can be positioned at least approximately parallel to a floor to be cleaned with respect to a longitudinal axis. The dirty fluid tank device can be designed with a large storage volume.For the same reason, it is advantageous if the free space is a continuation of a section of the dirty fluid tank device when the dirty fluid tank device is fixed to a floor head, wherein a continuation line is perpendicular to the first pivot axis.

[0056] In a structurally advantageous embodiment, a first column assembly, a second column assembly, and a third column assembly are positioned on a base head body of the base head, with the first column assembly, the second column assembly, and the third column assembly projecting transversely from the base head body. Corresponding components of the base head can be accommodated in a space-saving manner, thus enabling the realization of a dirty fluid tank assembly with a large storage volume.

[0057] In particular, at least one of the following is provided: the first column device comprises the blower device; the second column device comprises a drive device for the at least one cleaning tool; the third column device comprises the joint device.

[0058] The corresponding components can be accommodated in a space-saving manner. The dirty fluid tank system, in turn, can be designed with a large capacity for dirty fluid.

[0059] In particular, at least one of the following is provided: the first column device, the second column device, and the third column device are each spaced apart from one another; between the first column device and the second column device, a free space is formed as a movement space for the holding rod device; between the first column device and the third column device, and between the second column device and the third column device, a receptacle for the dirty fluid tank device is formed at least in a partial area;the first column device, the second column device and the third column device lie on an isosceles triangle, wherein the first column device and the second column device lie at a base of the triangle and the third column device lie on a height axis of the triangle relative to the base, and wherein in particular the base is parallel to a first pivot axis of the joint device and / or the height axis of the triangle is perpendicular to the first pivot axis;

[0060] This results in optimized use of space at the base head. The dirty fluid tank unit can be "housed" at the base head, allowing the dirty fluid tank unit to be designed with a large storage volume.

[0061] Furthermore, it is advantageous if at least a portion of a torque transmission device for transmitting torque from a drive device to the at least one cleaning tool is arranged between the first column device, the second column device, and the third column device. This results in optimized use of space. In particular, if the torque transmission device is designed to be "flat," this results in optimized use of space. The dirty fluid tank device can then also be fixed to the base head above the torque transmission device. Furthermore, it is advantageous if the first column device and / or the second column device have or form a contact area and / or a holding area for the dirty fluid tank device. This allows the number of components to be kept to a minimum.

[0062] Optimized space utilization is achieved when the first column device is located at a first corner region of a base head body of the base head and the second column device is located at a second corner region of the base head body, with the second corner region being opposite the first corner region. As a result, the column regions are arranged, so to speak, at the edge regions of the base head body, and a large receiving volume is provided at the base head for the dirty fluid tank device. This, in turn, allows the dirty fluid tank device to be realized with a large receiving volume for dirty fluid.

[0063] It is advantageous if a first disc holder and a first cleaning tool are provided, wherein the first disc holder is arranged on the floor head and holds the first cleaning tool and is driven to rotate about a first axis of rotation during operation of the floor cleaning machine, and a second disc holder and a second cleaning tool are provided, wherein the second disc holder is arranged on the floor head and holds the second cleaning tool and is driven to rotate about a second axis of rotation during operation of the floor cleaning machine, wherein the first axis of rotation of the first disc holder and the second axis of rotation of the second disc holder are each oriented transversely to the installation plane. This results in effective cleaning. In particular, the disc holders are driven to rotate in opposite directions. A propulsive force can be realized with cleaning tools inclined to the installation plane.This results in ease of use combined with high maneuverability. It is advantageous if a drive device for a first disc holder and a second disc holder is arranged on a base head body of the base head, in particular with at least one of the following: a common drive motor is provided for the first disc holder and the second disc holder; at least one drive motor is provided, which is arranged vertically on the base head body with a motor axis oriented transversely and in particular perpendicularly or at an angle of at most 10° to the perpendicular to the installation plane.

[0064] This results in optimized space utilization and provides sufficient space for the dirty fluid tank system. This, in turn, can be implemented with a large storage volume for dirty fluid.

[0065] Furthermore, it is advantageous if a gear housing, in which a torque transmission device is positioned, is arranged on a base head body of the base head, and an upper side of the housing forms a contact area and / or a holding area for the dirty fluid tank device when the dirty fluid tank device is fixed to the base head. This results in optimized space utilization, which in turn can be used for the dirty fluid tank device.

[0066] The ground head has a longitudinal axis which extends between a front end and a rear end of the ground head and which is parallel to a forward direction of travel of the ground head.

[0067] It is advantageous if at least one of the following is provided: the blower device is located in the region of the rear end; a drive device for the at least one cleaning tool is located in a region of the rear end; when the dirty fluid tank device is located on the floor head, a front side of the dirty fluid tank device is located on the front end of the floor head; an insertion direction of the dirty fluid tank device on the floor head has a directional component parallel to the longitudinal axis with a direction towards the rear end.

[0068] This results in optimized use of space at the base head for accommodating the dirty fluid tank unit. The dirty fluid tank unit, in turn, can be easily removed and inserted and can be designed with a large dirty fluid capacity.

[0069] It is advantageous for an operator if at least one of the following is provided: the dirty fluid tank device comprises a container and an openable and in particular removable lid; a container of the dirty fluid tank device and a lid of the dirty fluid tank device have substantially the same cross-sectional shape; a pivotable handle bar is located on the dirty fluid tank device and in particular on a container of the dirty fluid tank device; the dirty fluid tank device has a recessed area for recessedly holding a handle bar; a grip recess for gripping a handle bar and in particular a pivotable handle bar is arranged on a front side of the dirty fluid tank device;a pivot joint for pivoting a handle on the dirty fluid tank device is located in the area of ​​the joint device relative to a longitudinal axis of the floor head when the dirty fluid tank device is fixed to the floor head;

[0070] If the lid and container are essentially the same shape, a large access area can be provided for the container after the lid is removed. This allows for easy cleaning, for example.

[0071] By arranging a pivoting handle, the dirty fluid tank unit can be easily removed from the floor head.

[0072] Due to the recessed area, the handle essentially does not protrude beyond an outer contour of the dirty fluid tank device and the risk of "getting caught", including the risk of the dirty fluid tank device becoming accidentally detached from the floor head, is reduced.

[0073] The pivot bearing for the handlebar's pivoting is positioned near the joint assembly, allowing the dirty fluid tank assembly to be removed from the floor head at an angle. This makes it easy for the operator to remove the dirty fluid tank assembly.

[0074] In one embodiment, a removable tank for cleaning fluid is attached to the support rod assembly. The cleaning fluid from the tank assembly is supplied to the floor to be cleaned directly or via the cleaning tools. The arrangement of the tank for cleaning fluid on the support rod assembly results in optimized space utilization and an optimized center of gravity distribution.

[0075] For the same reason, it is advantageous to have a battery unit mounted on the support rod. The battery unit provides electrical power to the floor cleaning machine's electrical consumers.

[0076] It is advantageous if the battery unit and a tank unit for cleaning fluid are positioned on the same side of the support rod unit. This results in a structurally simple design with optimized mass distribution.

[0077] For the same reason, it is advantageous if the side on which the battery device and the tank device for cleaning fluid are located faces away from the operator side of the support rod device. This also allows for a large pivoting angle range for the support rod device relative to the floor to be cleaned. The support rod device can be implemented on the operator side with relatively small transverse dimensions, thus achieving a large pivoting range with an at least approximately parallel alignment to the floor to be cleaned at the maximum pivoting angle of the support rod device at the floor head.

[0078] It is particularly advantageous if the battery unit or a housing for the battery unit forms a mounting area and / or a holding area for the cleaning fluid tank. This results in optimized space utilization and minimizes the number of required components.

[0079] In one embodiment, an electronics box with a circuit device is mounted on the support rod device. This results in optimized use of space. In particular, at least one of the following is provided: the electronics box is mounted on a side facing away from a side on which a tank device for cleaning fluid and / or a battery device is mounted.

[0080] This results in a simple, constructive design with effective use of space.

[0081] It is particularly advantageous if a supply device is provided for supplying cleaning fluid from a tank device for cleaning fluid to a floor to be cleaned and / or to the at least one cleaning tool. In particular, the tank device for cleaning fluid is located on the support rod device. The supply device then ensures the supply of cleaning fluid from the support rod device (from the tank device) to the floor head.

[0082] Good maneuverability and ease of use for the operator is achieved if the support rod device includes a handlebar. The handlebar has, for example, a first arm and a second arm, each of which can be grasped by the operator's gripping hand.

[0083] It is particularly advantageous if at least one suction bar is arranged on the floor head, which is fluidly connected to the blower device. The floor to be cleaned can be subjected to the suction flow of the blower device via the suction bar and, in particular, a dirty water can be sucked off behind the at least one cleaning tool and coupled into the dirty fluid tank device on the floor head. It is advantageous if, based on a vertical axis of the floor head that is perpendicular to the installation plane, the suction bar is located directly below the blower device on the floor head, wherein in particular a vertical axis of the suction bar intersects the axis of the blower device parallel to the vertical axis. This results in a space-saving design. This results in optimized fluid guidance at the floor head.

[0084] The following description of preferred embodiments, taken in conjunction with the drawings, serves to further explain the invention. They show:

[0085] Figure 1 is a side view of an embodiment of a floor cleaning machine according to the invention;

[0086] Figure 2 is a sectional view of the floor cleaning machine according to

[0087] Figure 1 along the line 2-2 according to Figure 1;

[0088] Figure 3 is a sectional view taken along line 3-3 of the floor cleaning machine shown in Figure 1;

[0089] Figure 4 is a sectional view taken along line 4-4 of Figure 3, showing only one bottom head;

[0090] Figure 5 shows the floor cleaning machine according to Figure 1 in a position tilted as a whole relative to a support surface;

[0091] Figure 6 shows the floor head of the floor cleaning machine according to Figure 5 in the tilted position in a sectional view (similar to Figure 4) with a fill level indicated.

[0092] An embodiment of a floor cleaning machine according to the invention, which is shown in the figures and designated by 10, is used particularly for cleaning hard floors. It comprises a floor head 12 and a support rod device 14. The support rod device 14 is hinged to the floor head 12 via a hinge device 16 (see Figure 2).

[0093] At least one cleaning tool is arranged on the floor head 12. This will be described further below. The support rod device 14 serves to guide the floor cleaning machine 10 across a (walkable) floor 18 (see Figure 1) by a standing operator who stands on the floor 18 and faces an operator side 20 (see Figure 1) of the floor cleaning machine 10 and, in particular, the support rod device 14.

[0094] The floor head 12 comprises a floor head body 22 (tool deck). The floor head body 22 has a bottom side 24 and a top side 26. A support plane 28 is assigned to the floor head 12. The support plane 28 is defined by a plurality of support wheels 30 and the cleaning tools.

[0095] During operation of the floor cleaning machine 10, the floor cleaning machine 10 is supported on the floor 18 to be cleaned by the floor head 12 as a whole, via the support wheels 30 (Figures 1 and 4) and the at least one cleaning tool. If the floor 18 is level, then during cleaning operation of the floor cleaning machine 10, the installation plane 28 coincides with the floor 18.

[0096] The underside 24 of the base head body 22 faces the installation plane 28.

[0097] The floor head 12 has a front end 32 and a rear end 34 on the floor head body 22. It also has a first side end 36 and an opposite second side end 38. Between the front end 32 and the rear end 34, the floor head 12 (the floor head body 22) has a longitudinal axis 40. The longitudinal axis 40 is in particular parallel to a forward travel direction 42 of the floor head 12 (the floor cleaning machine 10) in a cleaning operation.

[0098] The base head 12 (the base head body 22) is assigned a transverse axis 44 (Figure 2) which is perpendicular to the longitudinal axis 40.

[0099] The base head 12 (the base head body 22) is also assigned a height axis 46 (Figure 1). The height axis 46 is perpendicular to the installation plane 28. The longitudinal axis 40 and the transverse axis 44 are each perpendicular to this height axis 46.

[0100] During operation of the floor cleaning machine 10, the operator is positioned behind the rear end 34 of the floor head 12 and faces the operator side 20.

[0101] At least one cleaning tool is mounted on the floor head 12. In one embodiment, a first disc holder 48 and a second disc holder 50 are mounted. The first disc holder 48 is mounted on the floor head body 22 for rotation about a first rotation axis 52. The first rotation axis 52 is perpendicular to the installation plane 28.

[0102] The second disk holder 50 is mounted on the base head body 22 for rotation about a second rotation axis 54. The second rotation axis 54 is oriented transversely to the installation plane 28.

[0103] A first cleaning tool 56 is mounted on the first disc holder 48. It can be rotated via the rotation of the first disc holder 48. A second cleaning tool 58 is mounted on the second disc holder 50. The second cleaning tool 58 can be rotated via the second disc holder 50. The first cleaning tool 56 and the second cleaning tool 58 are designed to rotate in opposite directions to one another. In one exemplary embodiment, the first cleaning tool 56 and the second cleaning tool 58 are inclined with an effective plane relative to the installation plane 28. A typical angle of inclination is, for example, in the range between 2° and 10° and in particular approximately 5°. As a result, propulsion (a propulsive force) is generated during cleaning operation of the floor cleaning machine 10, the arrangement being such that propulsion is generated in the forward travel direction 42.This makes it easier for an operator to guide and maneuver over a floor to be cleaned 18.

[0104] This inclination of the effective plane relative to the installation plane 28 can generally be achieved by orienting the first rotation axis 52 and the second rotation axis 54 at a corresponding acute angle to the installation plane 28. Corresponding axes of rotation of the first cleaning tool 56 and the second cleaning tool 58 then coincide with the first rotation axis 52 and the second rotation axis 54, respectively.

[0105] In an alternative embodiment, the associated rotational axis of the first cleaning tool 56 rotates on an (imaginary) conical surface with the first rotational axis 52 as the conical axis, and the associated rotational axis of the second cleaning tool 58 rotates on an (imaginary) conical surface with the second rotational axis 54 as the conical axis. The inclination angles of the effective planes correspond to the conical angles of the conical surface.

[0106] An effective area of ​​the first cleaning tool 56 and an effective area of ​​the second cleaning tool 58 (indicated in Figure 1 by reference numeral 60) protrude from the floor head body 22 relative to the underside 24, so that they can act on a floor 18 to be cleaned. The first cleaning tool 56 and the second cleaning tool 58 are each designed as a disc tool and, in particular, as a scrubbing disc. In one embodiment, the first cleaning tool 56 and the second cleaning tool 58 are each brush tools, and the effective area 60 is correspondingly formed by the effective area of ​​brushes (bundles of bristles).

[0107] In principle, it is also possible for the first cleaning tool 56 or the second cleaning tool 58 to have textile active areas or for a cleaning tool 56, 58 to have both brush active areas and textile active areas.

[0108] The base head body 22 has a first corner region 62 at the rear end 34 toward the second side end 38. It has a second corner region 64 at the first side end 36 at the rear end 34 (Figure 3). A drive device for the disc holders 48, 50 is arranged at the second corner region 64. This drive device comprises one, and in particular precisely one, drive motor 66.

[0109] In one embodiment, the drive motor 66 is arranged vertically on the ground head body 22; it has a motor axis 68 (drive axis 68) oriented parallel or at a small acute angle (in particular less than or equal to 10°) to the vertical axis 46 (Figure 2). The motor axis 68 is oriented transversely and in particular perpendicularly to the installation plane 28.

[0110] A torque transmission device is coupled to the drive motor 66 for torque transmission. The torque transmission device transmits the torque of the drive motor 66 to the first disc holder 48 and the second disc holder 50, and thus to the cleaning tools 56, 58. The torque transmission device is positioned on the upper side 26 of the floor head body 22. In this context, reference is made in full to DE 10 2024 105 791.2.

[0111] In one embodiment, the torque transmission device comprises a first gear which is directly coupled to the drive motor 66 and is driven in rotation directly by the drive motor 66.

[0112] The first disc holder 48 is torque-effectively connected to the first gear via a first belt drive.

[0113] A second gear is also provided, which is torque-coupled to the first gear. The second gear is directly driven in its rotational movement by the first gear.

[0114] The second disc holder 50 is torque-effectively coupled to the second gear via a second belt drive.

[0115] This design of the torque transmission causes a counter-rotation of the first disc holder 48 and the second disc holder 50, with a single drive motor 66 being provided at the second corner region 64 for this purpose.

[0116] The torque transmission device is flat. It is positioned in a gear housing, which is positioned on the top side 26 of the base head body 22.

[0117] The transmission housing comprises a first branch in which the first belt drive is positioned, and a second branch in which the second belt drive is positioned. A free space lies between the first branch and the second branch. The joint device 16 is mounted in this free space 86 on the base head body 22 and connected thereto.

[0118] In one embodiment, a strip 87 (Figure 3) is located on the ground head body 22 in front of the front end 32. This strip 87 defines the frontmost region of the ground head 12 relative to the forward direction of travel 42. It represents a type of bumper to prevent or cushion the ground head 12 from striking objects, walls, etc. The strip 87 is, in particular, made of an elastic material and / or is elastically mounted.

[0119] The joint device 16 is mounted on a holder 88. This holder is columnar and extends away from the base head body 22 in a direction parallel to the vertical axis 46. It is firmly connected to the base head body 22.

[0120] A first joint 90 is located on the holder 88. The first joint 90 is a pivot joint with a first pivot axis 92. The first pivot axis 92 is parallel to the installation plane 28. It is transverse and in particular perpendicular to the longitudinal axis 40. It is parallel to the transverse axis 44. It is transverse and in particular perpendicular to the vertical axis 46. It is transverse and in particular perpendicular to the forward direction of travel 42.

[0121] The first joint 90 enables the holding rod device 14 to be pivoted relative to the floor head 12, by means of which a distance of the operator side 20 from the floor 18 can be varied.

[0122] A second joint 96 is located on the first joint 90. The second joint 96 is a pivot joint with a second pivot axis 98. The second pivot axis 98 is transverse and in particular perpendicular to the first pivot axis 92.

[0123] The second joint 96 is connected to the first joint 90 in a rotationally fixed manner with respect to the first pivot axis 92, so that it follows the pivoting movement about the first pivot axis 92.

[0124] The first pivot axis 92 and the second pivot axis 98 intersect in one embodiment. The joint device 16 with the joints 90, 96 is a universal joint or "true" cardan joint.

[0125] The second joint 96 is pivotally connected to the holding rod device 14.

[0126] The holding rod device 14 is thereby pivotable on the joint device 16 about the second pivot axis 98 and about the first pivot axis 92 relative to the floor head 12.

[0127] Due to the pivotability about the first joint 90, the orientation of the second pivot axis 98 to the installation plane 28 changes. The second pivot axis 98 moves within a plane which is perpendicular to the installation plane 28.

[0128] The position of the first pivot axis 92 relative to the installation plane 28 remains the same.

[0129] The joint device 16 realizes a (true) cardanic joint for the linkage of the holding rod device 14 to the base head 12.

[0130] The holder 88 is located on the base head body 22 closer to the front end 32 than to the rear end 34. In one embodiment, the holder 88 is spaced from the front end 32 along the longitudinal axis 40.

[0131] The holder 88 is located in particular centrally between the first side end 36 and the second side end 38.

[0132] A blower device 100 is arranged on the base head body 22.

[0133] The blower device 100 is located at the first corner region 62 (see Figure 3).

[0134] The blower device 100 comprises a blower motor and at least one impeller.

[0135] During operation of the floor cleaning machine 10, the blower device 100 generates a suction flow for sucking in a dirty fluid.

[0136] Dirt fluid is defined here as a fluid that can flow and be carried along in a suction stream. The dirt fluid can be liquid or dry.

[0137] The blower device 100 is designed in particular as a bypass blower.

[0138] A suction bar 102 (see, for example, Figure 4) is arranged on the floor head body 22. This is positioned in the area of ​​the rear end 34.

[0139] During cleaning operation of the floor head 12, the suction bar 102 rests against the floor 18 to be cleaned. It is positioned behind the cleaning tools 56 and 58 with respect to the forward direction of travel 42.

[0140] The blower device 100 is fluidly connected to the suction bar 102, which is subjected to a suction flow. A dirty fluid liquor behind the cleaning tools 56, 58 can then be sucked away via the suction bar 102, and the sucked-away dirty fluid is coupled into a dirty fluid tank device 104.

[0141] The blower device 100, which is located at the first corner region 62, and the drive motor 66, which is located at the second corner region 64, are spaced apart from each other relative to the transverse axis 44. A free space 106, which will be described in more detail below, lies between them.

[0142] A first column device 108 is seated on the base head body 22 with an extension in an extension direction parallel to the height axis 46. The first column device 108 comprises the blower device 100. It comprises a first column housing 110 in which the blower device 100 is positioned.

[0143] Furthermore, a second column assembly 112 is arranged on the base head body 22 at the second corner region 64. This assembly comprises a second column housing 114. The second column assembly 112 comprises the drive motor 66, which is positioned in the second column housing 114.

[0144] A third column assembly 116 is also positioned on the base head body 22, which is spaced apart from the first column assembly 108 and spaced apart from the second column assembly 112. The third column assembly 116 includes the holder 88 for the joint assembly 16.

[0145] The third column device 116 is located, as already mentioned above, centrally between the first side end 36 and the second side end 38.

[0146] The free space 106, which is also a free space between the first column device 108 and the second column device 114 in the region of the rear end 34, is a movement space for the holding rod device 14, in particular when pivoting about the first pivot axis 92. The joint device 16 is designed such that it can be moved in the free space 106, in particular with the second holder 94 and the second joint 96.

[0147] This allows for small angles to be achieved between the support rod assembly 14 and the floor 18. This results in particularly good clearance under fittings or the like. At a small angle to the floor 18, the overall height of the device along the vertical axis 46 is determined by the height of the floor head 12.

[0148] In a side view, the base head 12, with the dirty fluid tank device 104 removed, has an L-shaped configuration with the base head body 22 and the column devices 108, 112 projecting transversely thereto (see also DE 10 2024 105 791.2, to which reference is made in its entirety).

[0149] The first column device 108, the second column device 112, and the third column device 116 lie on a triangle. The triangle has a base on which the first column device 108 and the second column device 112 lie. The triangle has a (triangular) height axis perpendicular to the base, which is in particular parallel to the longitudinal axis 40. The third column device 116 lies on this height axis.

[0150] The triangle is isosceles.

[0151] A movement space for the pivotability of the holding rod device 14 about the first pivot axis 92 lies on the height axis of the triangle.

[0152] The second pivot axis 98 lies in a plane containing this vertical axis and is perpendicular to the installation plane 28. The dirty fluid tank device 104 is a unit that can be removed as a whole from the floor head 12 and fixed to the floor head 12. It collects dirty fluid sucked in by the blower device 100, which is sucked away in particular from the floor 18 to be cleaned.

[0153] In one embodiment, a separator is integrated into the dirty fluid tank device 104.

[0154] The dirty fluid tank assembly 104 includes a container 122 and an openable lid 124. In particular, the lid 124 is removable as a whole from the container 122 to allow a large access area to the container 122.

[0155] In one embodiment, the lid 124 is fixed to the container 122 with a releasable snap connection.

[0156] The dirty fluid tank device 104 has a bottom side 128. This bottom side lies on the container 122. When the dirty fluid tank device 104 is fixed to the base head 12, the bottom side 128 of the dirty fluid tank device 104 faces the top side 26 of the base head body 22.

[0157] The dirty fluid tank assembly 104 further has a top surface 130, which faces away from the bottom surface 128. The top surface 130 lies against the cover 124.

[0158] The dirty fluid tank device 104 further has a front side 132 and a rear side 134 facing away from the front side.

[0159] Between the front side 132 and the rear side 134, the dirty fluid tank device 104 has a first lateral side 136 and an opposite second lateral side 138. The first lateral side 136 is located at the first side end 36 and the second lateral side 138 is located at the second side end 38 of the base head 12 when the dirty fluid tank device 104 is fixed to the base head 12.

[0160] The external shape of the dirty fluid tank device 104 is adapted to the shape of the base head 12 with the base head body 22. In one embodiment, the first lateral side 136 is set back toward the first side end 36. The same applies to the second lateral side 138 toward the second side end 38. As a result, a region 139 is formed between the base head body 22 and the dirty fluid tank device 104 on the base head body 22. This allows for improved underride capability.

[0161] Relative to the outer envelope, the dirty fluid tank device 104 has at least approximately a cuboid shape.

[0162] A handle 140 is arranged on the container 122, particularly directly below the lid 124. This handle is mounted on a pivot bearing 144, pivotable about a pivot axis 142.

[0163] In one embodiment, the pivot bearing 144 includes parts located on the first lateral side 136 and the second lateral side 138.

[0164] When the dirty fluid tank device 104 is fixed to the base head 12, the pivot axis 142 is parallel to the first pivot axis 92 of the articulation device 16. It is parallel to the installation plane 28.

[0165] The pivot axis 142 is oriented transversely to the first lateral side 136 and transversely to the second lateral side 138.

[0166] The handle bar 140 comprises opposing webs, each of which is connected to the pivot bearing 144. The webs are connected to each other via a connecting web. The handle bar 140 has a U-shaped configuration, with the webs corresponding to the upstrokes of the U.

[0167] The connecting web is positioned in the non-pivoted position of the handle bar 140 on the front side 132 of the dirty fluid tank device 104 (see Figure 1).

[0168] A recessed grip is provided on the front side 132 of the container 122 (and / or the lid 124). Through the recessed grip, an operator can access the connecting bar and thus the handle bar 140 in order to pivot it about the pivot axis 142.

[0169] In one embodiment, the container 122 has a groove. When not pivoted, the handle bar 140 is positioned in a recessed manner within this groove, so that it does not protrude or significantly protrude beyond the front side 132 and the lateral sides 136, 138.

[0170] When the dirty fluid tank device 104 is fixed to the base head 12 (see Figure 1), the pivot bearing 144 is spaced apart from the installation plane 28 in the vertical axis 46. The pivot bearing 144 is positioned in the region of the joint device 16 on the base head 12.

[0171] The dirty fluid tank device 104 with the handle 140 is arranged and configured such that an operator, when the dirty fluid tank device 104 is fixed to the base head 12, can pull the dirty fluid tank device 104 upward and forward away from the base head 12 in a direction 154 (see Figure 1) and thus remove it from the base head 12. The dirty fluid tank device 104 has a cutout 156 adapted to the joint device 16 and its position on the base head body 22. When the dirty fluid tank device 104 is inserted on the base head 12, the cutout 156 corresponds to the free space 106.

[0172] The cutout 156 is continuous between the bottom 128 and the top 130 of the dirty fluid tank device 104. It is open towards the rear 134.

[0173] The cutout 156 is arranged on both the lid 124 and the container 122.

[0174] The dirty fluid tank device 104 includes a first web area 158.

[0175] The first lateral side 136 is located on the first web region 158. The dirty fluid tank device 104 further comprises a second web region 160. The second lateral side 138 is located on the second web region 160. The first web region 158 and the second web region 160 are spaced apart from one another.

[0176] The back side 134 lies on the first web area 158 and the second web area 160.

[0177] The dirty fluid tank device 104 further comprises a third web region 162. The third web region 162 is oriented transversely to the first web region 158 and the second web region 160 (see also the

[0178] DE 10 2024 105 791.2, to which reference is made in its entirety). It is connected to both the first web region 158 and the second web region 160.

[0179] The dirty fluid tank device 104 has at least approximately the shape of a U due to the web regions 158, 160, 162, with the first web region 158 and the second web region 160 corresponding to upstrokes of the U. The web regions 158, 160, 162 encompass both the container 122 and the lid 124.

[0180] The cutout 156 is formed between the first web region 158 and the second web region 160 and the third web region 162. The third web region 162 forms a boundary of the cutout 156 toward the front side 132.

[0181] A receiving volume for dirty fluid is formed within the web areas 158, 160, 162 and at the container part of these web areas 158, 160, 162.

[0182] The second web region 160 is provided with an overlap region 176 which covers a partial region of the first column housing 110, on which in particular a counter connection 284 is located, in order to achieve an edge-free transition or a flush transition.

[0183] When the dirty fluid tank device 104 is fixed to the floor head 12, the hinge device 16 is positioned in the cutout 156.

[0184] The cutout 156 makes it possible to insert the dirty fluid tank device 104 in a direction 178 (see Figure 1), which includes a directional component parallel to the longitudinal axis 40 and from the front end 32 to the rear end 34, onto the floor head body 22 and to slide it over the joint device 16.

[0185] When the dirty fluid tank device 104 is fixed to the floor head 12, the cutout 156 extends from the articulation device 16 toward the rear end 34 to the free space 106, in order to provide the appropriate range of motion for the pivotability of the support rod device 14 on the articulation device 16. The dirty fluid tank device 104 has a relatively large receiving volume and is adapted to the design of the floor head body 22 with the column devices 108, 112, and 116 (of the articulation device 16).

[0186] The dirty fluid tank device 104 can be inserted into the base head body 22 with a directional component parallel to the direction 178 and can be removed in an opposite direction thereto and in particular in the direction 154 (which has a component antiparallel to the direction 178 and a component parallel to the height axis 46).

[0187] The base head body 22 with its upper side 26 and in particular the gear housing forms a contact surface and a holding surface for fixedly holding the dirty fluid tank device 104 on the base head 12. These contact areas / holding areas provide, in particular, downward support relative to the vertical axis 46.

[0188] The first column device 108 and the second column device 112 form a contact area / holding area with respect to the rear end 34.

[0189] In particular, a positive and / or non-positive connection is provided, by which the dirty fluid tank device 104 is fixed to the base head 12, which requires a certain amount of force after the fixation in order to be able to remove the dirty fluid tank device 104 in the direction 154 from the base head 12 and in particular to avoid unintentional detachment.

[0190] The dirty fluid tank device 104 has a receiving chamber 250.

[0191] The receiving chamber 250 defines a receiving space 252 for the dirty fluid with the receiving volume for the dirty fluid. The receiving space 252 extends over the first web region 158, the second web region 160, and the third web region 162.

[0192] An inlet port 254 (Figure 3) is arranged on the receiving chamber 250. The inlet port 254 is located on the first web region 158 on a bottom side (a floor) of the receiving chamber 250, which is the bottom side 128 of the dirty fluid tank device 104. It is provided with a valve so that no fluid flows out there when the dirty fluid tank device 104 is removed.

[0193] The inlet port 254 is located in the region of the rear end 134 (the rear side 134) of the receiving chamber 252 (the dirty fluid tank device 104).

[0194] A hose 256 (Figure 3) is located on the base head body 22, which is fluidly connected to the suction bar 102. A passage of a fluidly effective connection to the suction bar 102, to which the hose 256 is connected, is located in particular on a center plane between the first side end 36 and the second side end 38.

[0195] The hose 256 is fluidly connected to a mating connection 258 on the base head body 22. The mating connection 258 is the mating element of the inlet connection 254 of the receiving chamber 250 (of the dirty fluid tank device 104).

[0196] When the dirty fluid tank device 104 is properly fixed to the base head body 22, the inlet connection 254 is in fluid communication with the counter connection 258 and dirty fluid coming from the suction bar 102 can flow into the receiving space 252 via the inlet connection 254.

[0197] A first suction port 260 (Figure 3) is also arranged on the receiving chamber 250. The first suction port serves for fluid connection to the blower device 100 and for coupling a suction flow into the receiving chamber 252 in order to suck in the corresponding dirty fluid by means of the suction bar and couple it into the receiving chamber 252.

[0198] In one embodiment, the first suction port 260 is arranged on the same side of the receiving chamber 250 as a direct fluid connection to the blower device 100. For this direct fluid connection, a second suction port 262 (connection port 262) is provided, which is arranged on the dirty fluid tank device 104 and is spaced apart from the first suction port 260 (see Figure 4).

[0199] The first suction port 260 is arranged on an upper side 264 of the receiving chamber 250. This upper side 264 of the receiving chamber 250 faces the upper side 130 of the dirty fluid tank device 104. Relative to the vertical axis 46, the first suction port 260 is positioned at least approximately in the region of the greatest vertical distance from the underside 128 or at the greatest vertical distance from the installation plane 28, relative to a positioning of the dirty fluid tank device 104 on the base head body 22.

[0200] The first suction port 260 is arranged in the region of the front side 132 of the dirty fluid tank device 104, in such a way that a distance (in the longitudinal axis 40) to the front side 132 is considerably smaller than to the rear side 134. In particular, the distance of the first suction port 260 to the front side 132 of the dirty fluid tank device 104 is at most 50% and in particular at most 40% of the distance of the first suction port 260 in the longitudinal axis 40 to the rear side 134 of the dirty fluid tank device 104 (see Figure 4).

[0201] The first suction port 260 is further arranged on the second web region 160. The first suction port 260, via which the suction flow is coupled into the receiving space 252, is spaced apart from the inlet port 254 along both the transverse axis 44, the vertical axis 46, and the longitudinal axis 40, and is arranged on the other web region 160 (the second web region 160 compared to the first web region 158). This results in a maximum distance between the inlet port 254 and the first suction port 260. This, in particular, prevents direct suction from the inlet port 254 into the blower device 100.

[0202] The dirty fluid tank device 104 includes (at least) one channel 266 (Figure 4). This channel 266 fluidly connects the first suction port 260 to the second suction port 262. The second suction port 262, as a direct connection port to the blower device 100, is arranged on the rear side 134 or adjacent to the rear side 134 of the dirty fluid tank device 104.

[0203] In one embodiment, the channel 266 is formed on the second web region 160 and is formed in the region of the upper side 130 of the dirty fluid tank device 140 on the second web region 160.

[0204] The channel 266 is located outside the receiving space 252 and on a vertical axis of the dirty fluid tank device 104, which runs between the bottom side 128 and the top side 130, outside the receiving chamber 250.

[0205] In one embodiment, the channel 266 is arranged and configured such that a main flow direction therein is at least approximately parallel to the installation plane 28. In principle, the channel 266 can be formed on the container 122, or on the lid 124, or have partial regions on the container 122 and partial regions on the lid 124.

[0206] In one embodiment (Figure 4), the channel 266 is formed in the openable cover 124.

[0207] The dirty fluid tank device 104 has a basin 268 with a basin bottom 270 at the second suction port 262. The second suction port 262 (connection port 262) for direct connection to the blower device 100 is formed on the basin bottom 270.

[0208] The basin bottom 270 has greater width dimensions than the second suction connection 262.

[0209] In the embodiment shown, the basin bottom 270 and the basin 268 are formed on the cover 124.

[0210] The basin bottom 270 forms an inclined surface which lies at an acute angle 272 to a vertical axis 274 of the dirty fluid tank device 104 between the bottom 128 and the top 130. This vertical axis 274 (Figure 4) is parallel to the vertical axis 46 when the dirty fluid tank device 104 is properly positioned on the bottom head body 22.

[0211] Accordingly, the pelvic floor 270 with its inclined surface is also oriented at an acute angle (as the opposite angle to the acute angle 272) to the installation plane 28.

[0212] The basin 268 forms a receiving space 276 for liquid in the region of the second suction connection 262. The channel 266 has a main extension direction parallel to the longitudinal axis 40 when the dirty fluid tank device 104 is seated on the base head body 22. The basin 268 forms a type of nozzle, which, starting from this longitudinal extension of the channel 266, projects obliquely downward toward the support plane 28. In particular, this nozzle or flange projects in the direction of a support wheel 30 (see Figure 4) or a roller 230.

[0213] Below this nozzle, the dirty fluid tank device 104 has a free space 277, in which the blower device 100 is located at least partially when the dirty fluid tank device is located on the base head 12. The nozzle also serves as a cover for the blower device 100.

[0214] The blower device 100, which is mounted on the first column device 108, has an axis 278 (see Figure 4). The axis 278 is a rotational axis of an impeller of the blower device 100. It is a motor axis of a motor of the blower device 100.

[0215] The blower device 100 has its greatest extent (longitudinal extent) in the axis 278 between a bottom side 280 and a top side 282. The bottom side 280 faces the installation plane 28 and, accordingly, the top side 282 faces away from the installation plane 28.

[0216] On the upper side 282, a suction connection 284 of the blower device 100 is arranged, which is provided for direct connection to the second suction connection 262 (connection connection 262) of the dirty fluid tank device 104.

[0217] On the upper side 282, the blower device 100 is provided with an inclined surface which is oriented at the same angle to the height axis 46 as the inclined surface of the basin bottom 270 to the height axis 274 (when the lid 24 is closed).

[0218] The suction connection 284 has a center located on the axis 278. The blower device 100 is arranged on the floor head body 22 such that the axis 278 lies at an acute angle 286 to the installation plane 28 or the longitudinal axis 40.

[0219] This acute angle 286 lies in particular in the range between 45° and 75°. In a specific embodiment, this acute angle 286 lies in the range between 50° and 60°, for example, at approximately 55°.

[0220] The acute angle 272 corresponds in magnitude to the acute angle 286.

[0221] The blower device 100 is arranged such that its underside 280 (at least relative to a center on the axis 278) is closer to the rear end 34 of the floor head body 22 than the upper side 282 (at least relative to a center on the axis 278 of the upper side 282).

[0222] The blower device 100 tilts, so to speak, with its axis 278 away from the rear end 34 towards the front end 32.

[0223] The second suction port 262 (the connection port 262) has an orifice surface on the basin bottom 270 which is normal to the axis 278 when the dirty fluid tank assembly 104 is properly seated on the bottom head body 22.

[0224] As a result, the dirty fluid tank device 104 can be inserted with a directional component parallel to the longitudinal axis 40, and the corresponding inclined surfaces on the basin bottom 270 and the upper side 282 result in a fluid-tight connection in a simple manner during insertion.

[0225] The inclined surface on the upper side 282 effectively prevents liquid and dirt particles from accumulating on the upper side 282 of the blower device 100, particularly after a cleaning operation has been completed. The inclined surface on the upper side 282, which in turn is achieved by the inclination of the axis 278 relative to the installation plane 28, allows liquid to drain away. This prevents damage to the bearings of the blower device 100.

[0226] The basin 268 can hold liquid to a certain extent when the dirty fluid tank device 104 is seated on the floor head body 22.

[0227] The direct intake point for the receiving chamber 252 of the dirty fluid tank device 104 is formed at the first intake port 260. A short, streamlined intake path to the blower device 100 is formed via the channel 266 to the second intake port 262. This results in effective use of the suction power of the blower device 100.

[0228] In principle, it is also possible for the floor cleaning machine 10 to be guided over a floor 18 on the rollers 230 during a transport journey (see Figures 5 and 6).

[0229] There is a fundamental risk that liquid from a filled receiving space 252 will spill into the blower device 100. This is indicated in Figure 6 by reference numeral 288. Due to the arrangement of the first suction connection 260 on the dirty fluid tank device 104 "front and top," namely facing the top side 130 of the dirty fluid tank device 104 and facing the front side 132 of the dirty fluid tank device 104, even during a tilted transport journey in which the floor cleaning machine 10 is tilted as a whole (Figure 5), the dirty fluid tank device 104 can be filled.

[0230] The basin 268 and the channel 266 can also absorb any liquid spilling out of the receiving space 252. It is generally intended that, after removal of the dirty fluid tank device, any liquid remaining on the upper side 282 can flow toward an upper side of the floor head body 22, so that it does not remain on the blower device 100.

[0231] A connection 164 for the fluid-effective connection of the blower device 100 is arranged on the second web region 160.

[0232] In one embodiment, a mating connection 166 of the blower device 100, which is positioned on the base head body 22, lies on an inclined surface 168 (see Figure 3). The second web region 160 is provided in the region of the connection 164 with a correspondingly adapted inclined surface 170, on which the connection 164 lies.

[0233] When the dirty fluid tank device 104 is properly inserted into the base head 12, the mutually adapted inclined surfaces 170, 168 automatically create a fluid-effective connection between the connection 164 and the mating connection 166 with corresponding fluid tightness.

[0234] In one embodiment (see Figure 4), a cage 290 is located on the receiving chamber 250 in the receiving space 252. The cage 290 is removable, in particular (when the cover 124 is open), for cleaning purposes. The suction connection 260 is located on the cage 290. In one embodiment, the cage 290 has a base 292 which is closed except for an inlet for dirty fluid (see below). A wall 294 which is impermeable to dirty fluid is located on the base 292. One or more windows for pressure equalization are arranged on the wall 294 at a distance from the base 292. A pipe 300 which projects into the receiving space 252 is located on the base 292. Dirty fluid is coupled into the cage 290 via this pipe 300 (and in particular only via this pipe 300).

[0235] A float 296 is positioned in the cage 290. In one embodiment, the float 296 is designed as a ball. The float 296 is assigned to the suction port 260 and is designed such that it can generally close the suction port 260.

[0236] When a certain liquid level is reached in the cage 290, the float 296 is carried upwards by the liquid towards the suction port 284 until it is positioned in the suction port 284 and closes it.

[0237] A vacuum sensor 298 is provided. The vacuum sensor 298 is assigned to a suction side of the blower device 100. It is located, in particular, outside the dirty fluid tank device 104 on the base head body 22 and, in particular, on the top side 282 of the blower device 100.

[0238] In particular, it is provided that if an (increased) negative pressure is detected via the negative pressure sensor 298, the blower device 100 is switched off during operation of the floor cleaning machine 10.

[0239] Preferably, the vacuum sensor 298 is designed directly as a switch which generates a switching signal (switch-off signal) for the blower device 100 when vacuum is detected.

[0240] When a certain liquid level is reached in the receiving chamber 252 and the float 296 closes the suction port 260, a certain negative pressure is present in the channel 266 and upstream of the suction side of the blower device 100. This negative pressure is detectable by the negative pressure sensor 298. The negative pressure sensor 298 enables indirect level detection in the dirty fluid tank device 104. This level detection is thus performed without the dirty fluid tank device 104 having to be equipped with electronic means such as probes or contacts.

[0241] A holder 304 is located on the cover 124. This holder can hold the float 296 when the cover 124 is tilted open and the cage 290 is removed.

[0242] The support rod device 14 comprises a support rod 180. The support rod 180 has a longitudinal axis 182. It is connected distally to the joint device 16 and thereby connected to the second joint 96.

[0243] Proximally on the support rod 180 there is a handlebar 184 for an operator.

[0244] In one embodiment, a height of the support rod device 14 is adjustable as a distance between a proximal end of the support rod 180 and the link 184, in particular via a displaceable link.

[0245] The handlebar 184 has arms 186a, 186b. These can be grasped by an operator with the gripping hands.

[0246] A display and / or operating device 188 is arranged between the arms 186a, 186b.

[0247] A housing device, designated as a whole by 190, is mounted on the support rod 180. In the described embodiment, the support rod 180 is connected to the joint device 16, and the housing device 190 is held by the support rod 180. The support rod 180 is thus an essential structural component of the floor cleaning machine 10. It is also possible in principle for the housing device 190 to be connected to the joint device 16, and for a corresponding support rod to then be mounted on the housing device. In this example, the essential structural component ("backbone") of the floor cleaning machine 10 is the housing device 190.

[0248] The housing device 190 is positioned between the link 184 and the second joint 96. It is designed such that it does not significantly restrict the mobility of the support rod device 14 relative to the base head 12.

[0249] In one embodiment, a removable holder 191, for example for cleaning cloths, is located on the housing device 190 on the operator side 190.

[0250] A battery device 192 is located on the holding rod device 14. The battery device 192 is positioned above the floor head 12.

[0251] In one embodiment, the battery device 192 is mounted on a holder. The holder is connected to the support rod 180.

[0252] The support rod 180 has a side 196 facing the operator side 20. The battery device 192 is located on a side 198 facing away from the side 196.

[0253] When the holding rod device 14 is arranged upright (see Figure 1), the battery device 192 points forward.

[0254] The housing device 190 has a housing part 200 within which the battery device 192 is positioned in a protected manner.

[0255] The housing part 200 is closed both laterally and on a bottom side 202 toward the base head 12. A tank device 206 for cleaning fluid is removably mounted on a holder 204 (see Figure 2) on the support rod device 14. The cleaning fluid is, in particular, pure water, optionally with a surfactant cleaning agent additive.

[0256] The tank device 206 is removably mounted on the support rod device 14 between the underside 202 of the housing device 190 and the handlebar 184. The tank device 206, like the battery device 192, is mounted on the side 198 and faces away from the operator side 20.

[0257] At least a portion 208 of it is positioned above the battery device 192.

[0258] The tank assembly 206 is a unit that can be removed as a whole from the floor cleaning machine 10 (from the support rod assembly 14 and thereby from the holder 204). It has a bottom side facing the floor head 12.

[0259] The floor cleaning machine 10 comprises a supply device 226 for supplying cleaning fluid to the floor 18 to be cleaned. In particular, cleaning fluid is supplied from the tank device 206 to the cleaning rollers 56, 58. The supply device 226 is connected to the tank device 206. A corresponding connection is provided on the holder 204, so that, particularly when the tank device 206 is correctly fixed to the holder 204, a fluid-effective connection (in particular with controllability of the cleaning fluid supply to the floor head 12) is automatically established.

[0260] A pump is provided to convey cleaning fluid from the tank device 206 via the supply device 226 to the base head 12, or the conveyance is gravity-driven, and a solenoid valve, for example, is provided for control. In particular, a delivery rate can be adjusted via the display / operating device 188.

[0261] The tank device 206 is adapted in its external shape to the housing part 200, so that in particular a flush continuation is achieved when the tank device 206 is fixed to the holding rod device 14.

[0262] The holding rod device 14 comprises an electronics box in which a circuit device is arranged in a protected manner.

[0263] In one embodiment, (at least) one circuit board with corresponding electrical / electronic circuit components is arranged in the electronics box.

[0264] In particular, the electronics box is mounted on the support rod 180 facing away from the battery device 192 and away from the tank device 206.

[0265] In one embodiment, rollers 230 are arranged on the floor head 12 in the region of the rear end 34. These serve to transport the floor cleaning machine 10 outside of a cleaning operation.

[0266] In one embodiment, the support wheels 30 are positioned between them (see Figure 4). The rollers 230 are spaced apart from the installation plane 28.

[0267] The floor cleaning machine 10 according to the invention functions as follows:

[0268] During cleaning operation, the tank device 206 is located on the support rod device 14 and the dirty fluid tank device 104 is located on the floor head 12. An operator operates the floor cleaning machine 10 via the support rod device 14 with the handlebar 184 and stands behind the floor cleaning machine 10 on the operator side 20.

[0269] The cleaning tools 56, 58 are driven in their counter-rotation by the drive motor 66. Due to their inclination relative to the installation plane 28, they exert propulsion.

[0270] An operator can adjust the swivel angles at the first joint 90 and at the second joint 96 and adapt them to the machining process and, in particular, also carry out steering.

[0271] The cleaning tools 56, 58 rotate and act on the floor 18 to be cleaned.

[0272] Via the supply device 226, cleaning fluid is applied from the tank device 206 to the floor 18 to be cleaned and, in particular, initially to the cleaning tools 56, 58.

[0273] A dirty fluid is removed via the suction bar 102. The corresponding suction flow is generated by the blower device 100. Dirty fluid is coupled into the dirty fluid tank device 104 at the floor head 12.

[0274] The necessary electrical energy, in particular for the drive motor 66 and the blower device 100, is provided by the battery device 192.

[0275] After completing a cleaning process, an operator can remove the dirty fluid tank device 104 in the direction 154 via the handle 140. In the solution according to the invention, both the blower device 100 and the dirty fluid tank device 104 are arranged on the floor head 12. This results in short fluid paths for the dirty fluid. Furthermore, the center of gravity is optimized.

[0276] The dirty fluid tank device 104 is provided with the cutout 156. This allows the dirty fluid tank device 104 to be provided with a large storage volume, and also results in optimized positioning on the base head 12 without impeding the mobility of the holding rod device 14 on the joint device 16.

[0277] The blower device 100 and the drive motor 66 are positioned at the edge of the floor head 12 by the arrangement at the corner regions 64 and 62, respectively, such that they do not provide any significant limitations for the receiving volume of the dirty fluid tank device 104.

[0278] Through the corresponding column devices 108, 112 with the corresponding column housings 110, 114, they also provide contact areas / holding areas for fixing the dirty fluid tank device 104 to the base head 12.

[0279] The result is a compact and space-saving design.

[0280] The arrangement of the battery device 192 on the support rod device 14 and the arrangement of the tank device 206 on the support rod device 14, with the battery device 192 below the tank device 206, results in an optimized center of gravity (with a low center of gravity). In particular, the tank device 206 is arranged on the same side as the battery device 192 on the support rod device 14. They can be pivoted together with the support rod device 14 when pivoted on the joint device 16. This results in a large range of motion for the pivoting of the support rod device 14 (with battery device 192 and tank device 206) relative to the floor head 12. This, in turn, results in high maneuverability of the floor cleaning machine 10 and good adaptability to the specific cleaning requirements with "obstacles" on a floor 18 to be cleaned.

[0281] The blower device 100 is arranged inclined on the base head body 22 so that its axis 278 is oriented at the acute angle 286 to the installation plane 28.

[0282] This prevents, for example, liquid from accumulating on the top surface 282 of the blower assembly when storing the floor cleaning machine 10. This liquid drains away. This prevents the risk of bearing damage due to liquid penetration.

[0283] The dirty fluid tank device has the first suction port 260, which is a suction port for the receiving space 252 for coupling in a suction flow. It also has the second suction port 262, which is a suction port for coupling the suction flow into the dirty fluid tank device and also serves for coupling to the suction port 284 of the blower device 100.

[0284] The first suction port 260 is located "top" and "front." This results in a large receiving volume of the receiving space 252 during operation of the floor cleaning machine 10. A tilting movement with a filled dirt fluid tank is possible (Figures 5, 6). During a tilting movement, the mobility of the holding rod device 14 relative to the floor head 12 is blocked by a locking device. On the other hand, the oblique arrangement of the blower device 100 keeps the distance between the first suction port 260 and the second suction port 262 short and minimized. This results in a short, streamlined suction path via the channel 266. This, in turn, allows the suction power of the blower device 100 to be used effectively.

[0285] Due to the arrangement of the first suction connection "top" and "front" and the inlet connection 254 "bottom" and "rear", they have an almost maximum distance and direct suction at the inlet connection is prevented.

[0286] If liquid spills out of the receiving space 252 from the first suction connection 260, the channel 266 and the basin 268 can still absorb a certain amount of liquid and spillage out, for example, onto a surface to be cleaned is prevented.

[0287] When the dirty fluid tank device 104 is removed from the base head 12, the liquid can flow out of the basin 268 if it has collected there.

[0288] List of reference symbols

[0289] Floor cleaning machine

[0290] Ground head

[0291] Holding rod device

[0292] Joint device

[0293] Floor

[0294] Operator side

[0295] Ground head body

[0296] bottom

[0297] Top

[0298] Installation level

[0299] support wheel

[0300] front end

[0301] back end first page end second page end

[0302] Longitudinal axis

[0303] Forward direction

[0304] transverse axis

[0305] Height axis first disc holder second disc holder first rotation axis second rotation axis first cleaning tool second cleaning tool effective area first corner area second corner area drive motor

[0306] Motor axle

[0307] Free space

[0308] bar

[0309] Holder first joint first pivot axis second joint second pivot axis

[0310] Blower device

[0311] Suction bar

[0312] Dirty fluid tank system

[0313] Free space first column device first column housing second column device second column housing third column device

[0314] container

[0315] Lid

[0316] bottom

[0317] Top

[0318] front

[0319] Back first lateral side second lateral side

[0320] Area

[0321] Handlebar

[0322] Swivel axis

[0323] swivel bearing

[0324] Direction

[0325] Section first bridge area second bridge area third bridge area

[0326] Coverage area

[0327] Direction

[0328] Holding rod

[0329] Longitudinal axis

[0330] Handlebar a, 186b Arm

[0331] Display / operating device

[0332] Housing equipment

[0333] holder

[0334] Battery setup

[0335] Page

[0336] Page

[0337] Housing part

[0338] bottom

[0339] holder

[0340] Tank facility for cleaning fluid

[0341] Feeding device

[0342] role

[0343] Recording chamber

[0344] recording room

[0345] Input connection

[0346] Hose

[0347] Counter connection first suction connection second suction connection (connection connection)

[0348] Top

[0349] channel

[0350] pool

[0351] Tank bottom acute angle vertical axis receiving space free space axis bottom top suction connection acute angle liquid cage bottom wall float vacuum sensor pipe holder

Claims

Patent claims 1. A floor cleaning machine, comprising a floor head (12) which is assigned a support plane (28) for a floor (18) to be cleaned, at least one cleaning tool (56; 58) which is rotatably arranged on the floor head (12), a holding rod device (14) which is movably linked to the floor head (12) via a joint device (16), a blower device (100) which generates a suction flow during operation of the floor cleaning machine, and a dirty fluid tank device (104) for receiving dirty fluid, characterized in that the blower device (100) is arranged on the floor head (12), that the dirty fluid tank device (104) is removably seated on the floor head (12), and that an axis (278) of the blower device is oriented at an acute angle (286) to the support plane (28).

2. Floor cleaning machine according to claim 1, characterized by at least one of the following: the axis (278) of the blower device (100) is a rotational axis of at least one impeller of the blower device (100); the axis (278) of the blower device (100) is a motor axis of a motor of the blower device (100); the blower device (100) has its greatest longitudinal extent parallel to the axis (278); the axis (278) of the blower device (100) is a normal for an upper side (282) of the blower device (100), wherein a suction connection (284) is arranged on the upper side (282).

3. Floor cleaning machine according to claim 1 or 2, characterized by at least one of the following: the acute angle (286) is greater than or equal to 45° and is in particular greater than or equal to 50° and is in particular greater than or equal to 55°; the acute angle (286) is less than or equal to 75° and is in particular less than or equal to 70° and is in particular less than or equal to 65°.

4. Floor cleaning machine according to one of the preceding claims, characterized in that an axis of rotation (52; 54) of the at least one cleaning tool (56; 58) is oriented at an acute angle greater than 10° and in particular greater than 40° to the axis (278) of the blower device (100).

5. Floor cleaning machine according to one of the preceding claims, characterized in that the blower device (100) is arranged inclined with respect to its axis (278) on a floor head body (22) of the floor head (12) such that an underside (280) of the blower device (100), which faces the installation plane (28), has a smaller distance to a rear end (34) of the floor head body (22) at a center on the axis (278) than an upper side (282) of the blower device (100) facing away from the underside (280), wherein the rear end (34) is related to a forward travel direction (42) of the floor head (12).

6. Floor cleaning machine according to one of the preceding claims, characterized in that a suction connection (284) of the blower device (100) is arranged on an upper side (282) of the blower device (100), which faces away from a lower side (280) of the blower device (100), wherein the lower side (280) faces the installation plane (28), and wherein in particular at least with respect to an envelope plane the upper side (282) of the blower device (100) is oriented at an acute angle to the installation plane (28).

7. Floor cleaning machine according to claim 6, characterized by at least one of the following: the suction port (284) of the blower device (100) lies on the axis (278) of the blower device (100); a center of the suction port (284) of the blower device (100), which lies on the axis (278), has a greater distance from a rear end (34) of a floor head body (22) of the floor head (12) than a center of the underside (280), which lies on the axis (278).

8. Floor cleaning machine according to one of the preceding claims, characterized in that the dirty fluid tank device (104) comprises a receiving chamber (250) with a receiving space (252) for dirty fluid, and that at least one suction connection (260) is arranged on the receiving chamber (250).

9. Floor cleaning machine according to claim 8, characterized in that the dirty fluid tank device (104) has at least one channel (266) which leads from the at least one suction connection (260) on the receiving chamber (250) to a connecting connection (262) of the dirty fluid tank device (104) for connection to the blower device (100).

10. Floor cleaning machine according to claim 9, characterized in that the at least one suction connection (260) on the receiving chamber (250) is a first suction connection (260) of the dirty fluid tank device (104), which opens into the receiving space (276), and the connecting connection (262) is a second suction connection (262) of the dirty fluid tank device (104), which is designed for fluid-effective coupling to a suction connection (284) of the blower device (100).

11. Floor cleaning machine according to claim 9 or 10, characterized in that the connecting connection (262) has an outlet surface with at least one of the following: when the dirty fluid tank device (104) is located on the floor head (12), the outlet surface is oriented at an acute angle to the installation plane (28); when the dirty fluid tank device (104) is located on the floor head (12), a normal of the outlet surface is at least approximately parallel to the axis (278) of the blower device (100); when the dirty fluid tank device (104) is located on the floor head (12), the connecting connection (262) is located above the suction connection (284) of the blower device (100) with respect to the axis (278) of the blower device (100); the dirty fluid tank device (104) has a free space (277) for the blower device (100) at the connecting connection (262).

12. Floor cleaning machine according to one of claims 9 to 11, characterized in that the at least one channel (266) on the connecting connection (262) has a basin (268) for receiving liquid, with a basin bottom (270), wherein in particular the connecting connection (262) is located on the basin bottom (270), and wherein in particular the basin bottom (270) has a normal parallel to the axis (278) of the blower device (100) when the dirty fluid tank device (104) is located on the floor head body (22).

13. Floor cleaning machine according to one of claims 9 to 12, characterized by at least one of the following: the at least one channel (266) is arranged or formed in an upper region of the dirty fluid tank device (104), which, when the dirty fluid tank device (104) is seated on the floor head (12), faces away from the installation plane (28); the at least one channel (266) is arranged or formed at least partially on a cover (124) of the dirty fluid tank device (104); the at least one channel (266) is arranged or formed above the receiving space (252) relative to a height axis (46) of the floor head (12) perpendicular to the installation plane (28), when the dirty fluid tank device (104) is seated on the floor head (12); the at least one channel (266) extends from an area at or adjacent to a front side (132) of the dirty fluid tank device (104) to a rear side (134) of the dirty fluid tank device (104), wherein the front side (132) of the dirty fluid tank device (104) faces a front end (32) of a floor head body (22) of the floor head (12) and the rear side (134) of the dirty fluid tank device (104) faces a rear end (34) of the floor head body (22) when the dirty fluid tank device (104) is seated on the floor head (12), and wherein the front end (32) and the rear end (34) of the floor head body (22) are related to a forward travel direction (42) of the floor head (12); the at least one channel (266) is arranged and designed such that a main flow direction in the at least one channel (266) is at least approximately parallel to the installation plane (28) when the dirty fluid tank device (104) is seated on the base head (12);the at least one channel (266) extends at least approximately parallel to a longitudinal axis of the dirty fluid tank device (104) between a front side (132) and a rear side (134) of the dirty fluid tank device (104); 14. Floor cleaning machine according to one of claims 8 to 13, characterized in that the at least one suction connection (260) on the receiving chamber (250) is arranged on an upper side of the receiving chamber (250), which is facing away from the installation plane (28) when the dirty fluid tank device (104) is seated on the floor head (12).

15. Floor cleaning machine according to one of claims 8 to 14, characterized in that the at least one suction connection (260) is arranged on the receiving chamber (250) such that it is located at least approximately at a highest point of the receiving space (252) with respect to a height axis (46) perpendicular to the installation plane (28) when the dirty fluid tank device (104) is located on the floor head (12).

16. Floor cleaning machine according to one of claims 8 to 15, characterized in that the at least one suction connection (260) on the receiving chamber (250) is arranged closer to a front side (132) of the dirty fluid tank device (104) than to a rear side (134) of the dirty fluid tank device (104).

17. Floor cleaning machine according to one of claims 8 to 15, characterized in that a cage (290) is arranged on the receiving chamber (250), to which the at least one suction connection (260) is assigned.

18. Floor cleaning machine according to claim 17, characterized in that the cage (290) is assigned a float (296), by means of which the at least one suction connection (260) can be closed when a certain fill level is reached.

19. Floor cleaning machine according to one of the preceding claims, characterized by a vacuum sensor (298) by which a vacuum in front of a suction side of the blower device (100) can be detected, wherein signals of the vacuum sensor (298) are used to switch off the blower device (100).

20. Floor cleaning machine according to claim 19, characterized in that the negative pressure sensor (298) is arranged on a floor head body (22) of the floor head (12) and in particular is located on the blower device (100).

21. Floor cleaning machine according to one of the preceding claims, characterized in that the dirty fluid tank device (104) has at least one inlet connection (254) for coupling dirty fluid into a receiving space (252), which is in particular connected to a suction bar (102) when the dirty fluid tank device (104) is seated on the floor head (12), and has at least one suction connection (260) on a receiving chamber (250) for fluidly connecting to the blower device (100), wherein the at least one inlet connection (254) and the at least one suction connection (260) are spaced apart in a vertical axis (274) perpendicular to the installation plane (28) and in a longitudinal axis between a front side (132) and a rear side (134) of the dirty fluid tank device (104), wherein the longitudinal axis is perpendicular to the vertical axis (274).

22. Floor cleaning machine according to claim 21, characterized in that the at least one inlet connection (254) and the at least one suction connection (260) are spaced apart in a transverse axis perpendicular to the longitudinal axis and perpendicular to the height axis (274).

23. Floor cleaning machine according to one of the preceding claims, characterized in that the dirty fluid tank device (104) has a bottom side (128), a top side (130), a front side (132), a back side (134), a first lateral side (136) and a second lateral side (138) opposite the first lateral side (136), and in that the dirty fluid tank device (104) has a cutout (156) which is formed between the bottom side (128) and the top side (130) is continuous and open, and which is open towards the back (134).

24. Floor cleaning machine according to claim 23, characterized in that the dirty fluid tank device (104) has a first web region (158) on which the first lateral side (136) lies, a second web region (160) on which the second lateral side (138) lies and which is spaced from the first web region (158), and a third web region (162) which is connected to the first web region (158) and the second web region (160), wherein the cutout (156) is formed between the first web region (158), the second web region (160) and the third web region (162).

25. Floor cleaning machine according to claim 24, characterized in that at least one inlet connection (254) of the dirty fluid tank device (104) is arranged on the first web region (158), and at least one suction connection (260) of the dirty fluid tank device (104) is arranged on the second web region (160).

26. Floor cleaning machine according to claim 25, characterized in that a connecting connection (262) of the dirty fluid tank device (104) for direct connection to the blower device (100) is arranged on the second web region (160).

27. Floor cleaning machine according to claim 25 or 26, characterized in that at least one channel (266) which connects the at least one suction connection (260) and the connecting connection (262) is arranged on the second web region (160).

28. Floor cleaning machine according to one of the preceding claims, characterized in that the floor head (12) has a floor head body (22) on which the joint device (16) is seated, wherein the floor head body (22) in particular has a plate-shaped region.

29. Floor cleaning machine according to one of the preceding claims, characterized by at least one of the following: the joint device (16) comprises a first joint (90) with a first pivot axis (92) and a second joint (96) with a second pivot axis (98), wherein the first pivot axis (92) and the second pivot axis (98) are oriented transversely and in particular perpendicular to one another and the first pivot axis (92) is oriented parallel to the installation plane (28); a first pivot axis (92) of the joint device (16) is oriented transversely and in particular perpendicular to a forward travel direction (42) of the floor head (12); by means of the joint device (16), the holding rod device (14) is articulated in a gimbal manner to the floor head (12) and has, in particular, intersecting joint axes.

30. Floor cleaning machine according to one of the preceding claims, characterized in that the dirty fluid tank device (104) has a cutout (156), wherein when the dirty fluid tank device (104) is positioned on the floor head (12), the joint device (16) lies at least partially in the cutout (156).

31. Floor cleaning machine according to one of the preceding claims, characterized in that a free space (106) is arranged or formed on the floor head (12) as a movement space for pivoting the holding rod device (14) relative to the floor head (12) about a first pivot axis (92), wherein the first pivot axis (92) is perpendicular to a forward travel direction (42) of the floor head (12).

32. Floor cleaning machine according to claim 31, characterized in that the free space (106) is a continuation of a cutout (156) of the dirty fluid tank device (104) when the dirty fluid tank device (104) is fixed to the floor head, wherein a continuation line is perpendicular to the first pivot axis (92).

33. Floor cleaning machine according to one of the preceding claims, characterized in that a first column device (108), a second column device (112) and a third column device (116) are positioned on a floor head body (22) of the floor head (12), wherein the first column device (108), the second column device (112) and the third column device (116) protrude transversely from the floor head body (22).

34. Floor cleaning machine according to claim 33, characterized by at least one of the following: the first column device (108) comprises the blower device (100); the second column device (112) comprises a drive device (66) for the at least one cleaning tool (56; 58); the third column device (116) comprises and / or holds the joint device (16).

5. Floor cleaning machine according to claim 33 or 34, characterized by at least one of the following: the first column device (108), the second column device (112) and the third column device (116) are each spaced apart from one another; between the first column device (108) and the second column device (112) a free space (106) is formed as a movement space for the holding rod device (14); between the first column device (108) and the third column device (116), and between the second column device (112) and the third column device (116), a receptacle for the dirty fluid tank device (104) is formed at least in a partial area;the first column device (108), the second column device (112) and the third column device (116) lie on an isosceles triangle, wherein the first column device (108) and the second column device (112) lie at a base of the triangle and the third column device (116) lie on a height axis of the triangle relative to the base, and wherein in particular the base is parallel to a first pivot axis (92) of the joint device (16) and / or the height axis of the triangle is perpendicular to the first pivot axis (92); 36. Floor cleaning machine according to one of claims 33 to 35, characterized in that between the first column device (108), the second column device (112) and the third column device (116) at least a partial region of a torque transmission device for transmitting a torque from a drive device (66) to the at least one cleaning tool (56; 58) is arranged.

37. Floor cleaning machine according to one of claims 33 to 36, characterized in that the first column device (108) and / or the second column device (112) have or form a contact area and / or a holding area for the dirty fluid tank device (104).

38. Floor cleaning machine according to one of claims 33 to 37, characterized in that the first column device (108) is seated at a first corner region (62) of a floor head body (22) of the floor head (12) and the second column device (112) is seated at a second corner region (64) of the floor head body (22), wherein the second corner region (64) is opposite the first corner region (62).

39. Floor cleaning machine according to one of the preceding claims, characterized by a first disc holder (48) and a first cleaning tool (56), wherein the first disc holder (48) is arranged on the floor head (12) and holds the first cleaning tool (56) and is driven to rotate about a first axis of rotation (52) during operation of the floor cleaning machine, and a second disc holder (50) and a second cleaning tool (58), wherein the second disc holder (50) is arranged on the floor head (12) and holds the second cleaning tool (58) and is driven to rotate about a second axis of rotation (54) during operation of the floor cleaning machine, wherein the first axis of rotation (52) of the first disc holder (48) and the second axis of rotation (54) of the second disc holder (50) are each oriented transversely to the installation plane (28).

40. Floor cleaning machine according to claim 39, characterized in that a drive device (66) for the first disc holder (48) and second disc holder (50) is arranged on a floor head body (22) of the floor head (12), in particular with at least one of the following: a common drive motor (66) is provided for the first disc holder (48) and the second disc holder (50); at least one drive motor (66) is provided, which is arranged upright on the floor head body (22) with a motor axis (68) which is oriented transversely and in particular perpendicularly or at an angle of at most 10° to the perpendicular to the installation plane (28).

41. Floor cleaning machine according to one of the preceding claims, characterized in that a gear housing is arranged on a floor head body (22) of the floor head (12), in which gear housing a torque transmission device is positioned, and in that an upper side of the gear housing forms a contact area and / or a holding area for the dirty fluid tank device (104) when the dirty fluid tank device (104) is fixed to the floor head (12).

42. Floor cleaning machine according to one of claims 23 to 41, characterized by at least one of the following: the rear side (134) lies on the first web region (158) and the second web region (160); the front side (132) lies against the third web region (162); the dirty fluid tank device (104) has a U-shape in plan view with the first web region (158) and the second web region (160) each forming an upstroke for the U.

43. Floor cleaning machine according to one of claims 23 to 42, characterized in that the first web region (158) has a first overlap region and / or the second web region (160) has a second overlap region (176) for a housing region on the floor head (12).

44. Floor cleaning machine according to one of the preceding claims, characterized in that the floor head (12) has a longitudinal axis (40) which extends between a front end (32) and a rear end (34) of the floor head (12), and which is parallel to a forward travel direction (42) of the floor head (12), with at least one of the following: the blower device (100) is located in the region of the rear end (34); a drive device (66) for the first disc holder (48) and the second disc holder (50) is located in a region of the rear end (34); with a dirt fluid tank device located on the floor head (12) (104) a front side (132) of the dirty fluid tank device (104) is located at the front end (32) of the bottom head (12); an insertion direction of the dirty fluid tank device (104) on the base head (12) has a directional component (178) parallel to the longitudinal axis (40) with a direction towards the rear end (34).

45. Floor cleaning machine according to one of the preceding claims, characterized by at least one of the following: the dirty fluid tank device (104) comprises a container (122) and an openable and in particular removable lid (124); a container (122) of the dirty fluid tank device (104) and a lid (124) of the dirty fluid tank device (104) have substantially the same cross-sectional shape; a pivotable handle (140) is located on the dirty fluid tank device (104) and in particular on a container (122) of the dirty fluid tank device (104); the dirty fluid tank device (104) has a recessed area (152) for recessedly holding a handle (140); on a front side (132) of the dirty fluid tank device (104) there is arranged a gripping recess for gripping a handle bar (140) and in particular a pivotable handle bar (140); a pivot bearing (144) for pivoting a handle bar (140) on the dirty fluid tank device (104) is located in the region of the joint device (16) with respect to a longitudinal axis (40) of the base head (12) when the dirty fluid tank device (104) is fixed to the base head (12).

46. ​​Floor cleaning machine according to one of the preceding claims, characterized in that a tank device (206) for cleaning liquid is removably seated on the holding rod device (14).

47. Floor cleaning machine according to one of the preceding claims, characterized in that a battery device (192) is located on the holding rod device (14).

48. Floor cleaning machine according to claim 47, characterized in that the battery device (192) and a tank device (206) for cleaning liquid are positioned on a same side of the holding rod device (14).

49. Floor cleaning machine according to claim 48, characterized in that the side (198) on which the battery device (192) and the tank device (206) for cleaning liquid are located is facing away from an operator side (20) of the holding rod device (14).

50. Floor cleaning machine according to one of claims 47 to 49, characterized in that the battery device (192) or a housing for the battery device (192) forms a contact area and / or a holding area for the tank device (206) for cleaning liquid.

51. Floor cleaning machine according to one of the preceding claims, characterized by a supply device (226) for supplying cleaning liquid from a tank device (206) for cleaning liquid to a floor (18) to be cleaned and / or to the first cleaning tool (56) and / or to the second cleaning tool (58).

52. Floor cleaning machine according to one of the preceding claims, characterized in that the holding rod device (14) comprises a handlebar (184).

53. Floor cleaning machine according to one of the preceding claims, characterized in that at least one suction bar (102) is arranged on the floor head (12), which is fluidly connected to the blower device (100).

54. Floor cleaning machine according to claim 53, characterized in that, with respect to a height axis (46) of the floor head (12), which is perpendicular to the installation plane (28), the suction bar (102) is located directly below the blower device (100) on the floor head (12), wherein in particular a height axis of the suction bar parallel to the height axis (46) intersects the axis (278) of the blower device (100).

Images